Outline how selective breeding produced vigorous, genetically uniform maize varieties.
Suggest why IR8 is better than the PETA variety of rice.
Scientists sequenced the DNA of FR13A, IR64 and IR64-Sub1. Suggest the benefit of sequencing the DNA of IR64-Sub1.
After a few generations of breeding, the scientists crossed IR64-Sub1 with IR64. Explain why the scientists crossed IR64-Sub1 with IR64.
Suggest the advantage of sequencing the DNA of IR64-Sub1.
Once a few breeding generations had passed, the scientists crossed IR64-Sub1 with IR64. Explain why the scientists crossed IR64-Sub1 with IR64.
With reference to Fig. 6.2, suggest explanations for the different responses to gibberellin shown by dwarf variety A and dwarf variety B.
BZR1 is a transcription factor involved in controlling growth and development in $A.\ thaliana$. Outline the features of a transcription factor such as BZR1.